Published on in Category Basics
In this article we will see in details about the roller/radial bearings, and its types and dimensions. Parts in Bearing ##Seals and Shields To help retain bearing lubrication and prevent contamination from the environment a seal (contact) or shield (non-contact) can be employed. Often no seal (Open) is required when the bearing will be housed and externally lubricated or when operated in a vacuum. Seal Identification Type Symbol Properties Cost Description Shield Z They have fair dust resistance and poor water resistance.